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R. BHELLMUIID AND C. W. STARKER.

DYNAMO ELECTRIC MACHINE- APPLICATION FILED OCT- 14, I916.

Patented May 27, 1919.

3 SHEETSSHEET l.

INVENTORS WHI'NESSES:

Rudolf E He/lmund M m v fimg les W. Sfr/rer u j M a ATTORNEY I R. E. HEL LIV|UND AND C. W. STARKER.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED 001.14. I916.

Patented May 27, 1919.

3 SHEETSSHEET 2.

w Char/gs W Sf'arker WITNESSES:

ATTORNEY E. HELLIVIUND AND C. W. STA

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED 001.14, 1915.

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Patented May 27, 1919.

WITNESSES:

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iNVEN-TORS Rudolf E Hal/mum! 1;? bar/es W Sfar/rer pnrrnn snares rarnnr cr mson.

RUDOLF E. HELLMUND, OF SWISSVALE, AND CHARLES W. STABKEB, OF PITTSBURGH, PENNSYLVANIA, ASSIGNORS TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

DYNAlVIO-ELECTRIC MACHINE.

Application filed October 14, 1916.

To all whom it may concern:

Be it known that we, RUooLr E. HELL- MUND, a subject of the German Emperor, and a resident of Swissvale, in the county of- Allegheny and State of Pennsylvania, and CHARLns W. STARKER, a subject of the German Emperor, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Dynamo Electric Machines, of which the following is a specification.

Our invention relates to dynamo-electric machines and especially to certain structural features of frames for electric railway motors and the like.

One object of our invention is to provide relatively simple and inexpensive means for permitting a variation of certain important. frame dimensions, while utilizing standardized parts and without requiring a varied setting of manufacturing machines.

More specifically stated, it is an object of our invention to provide a dynamo-electric machine frame having a gap in one side provided with parallel outwardly extending lips for receiving and supporting an axlebracket, the length of the lips being selected to procure any desired distance between the center of the motor frame and the axlebracket position.

Our invention may best be understood by reference to the accompanying drawings, wherein Figure 1 is a view, in end elevation, with parts broken away for clearness, of a dynamo-electric machine frame embodying our invention; Fig. 2 is a view, in side elevation, of the structure that is shown in Fig. 1; and Fig. 3 and Fig. 4 are detail views taken at right angles, the one to the other, of a certain portion of the frame that is illustrated in Fig. 1.

Referring to the drawings, the structure shown comprises a main magnetizable yoke or band member 1, preferably of the illustrated customary polygonal shape, having a gap or opening 2- (best shown in Fig. 3 and Fig. 4:) in one side that is provided with parallel, outwardly-extending lips 3 and 4 of a length that is selected to meet the desired conditions, as more fully set forth later. An axle-bracket seat member 5 of approximately semi-cylindrical form, is lo Specification of Letters Patent.

Serial No. 125,587.

cated in such manner as to mechanically and magnctizably bridge the gap 2 for the purpose of supporting the customary axle bracket (not shown), as subsequently described in detail.

A pair of endmembers, which may take the form of rings 6 and 7, are spaced suit-' able distances apart from the main yoke member 1 and are mechanically secured thereto through the agency of the axlebracket seat 5, a plurality of tie-pieces 8, and a suspension bar 9, as about to be set forth fully.

The axle-bracket seat member 5 preferably is of a length greater than the over-all dimension of the remainder of the motor frame, as clearly shown in Fig. 2, and comprises an approximately semi-cylindrical intermediate portion 11 and right-angled endprojections 12 and 13 which respectively abut against the ends of the outwardly-extending lips 3 and 4 of the main yoke member 1. The lips 3 and 4 are provided with a suitable number of holes or apertures 14;

through which extend rivets 15 for the purpose of securing the longitudinal central portion of the seat member 5 to the yoke member.

In the process of manufacture of the main yoke member 1, the dies, which are employed in presses to suitably shape the yoke member from a flat bar, may be utilized to produce yoke members having any desired length of lips 3 and 4, merely by suitably selecting the initial length of the bar in question. Thus, the same dies may be employed to provide the main yoke member 1,- as illustrated in solid lines, or a corresponding yoke member having longer lips, as indicated by the dotted extensions 16 and 17 of the present lips 3 and l. The same axle-bracket seat member 5 may be secured to the lips of whatever length, as indicated by the dotted structures 18, 19 and 20, which respectively correspond to the solid line members 11, 12 and.13. I i v The purpose of varying the length of the lips 3 and 4 is to procure the desired distance between the ;center. of the motor frame and the axle-bracket position, or, in other words, to. vary the gearrcenter-distance of a railway motor, that is, to say, the distance between the armature shaft and Patented May 27, 1919.

the center of the driven gear wheel that is usually employed in connection wlthrailway motors.

As is well known, it is desirable to provide means for varying the aboveanentioned gear-centerdistance to meet certain operating conditions which it is not necessary to discuss in detail here, and our present invention provides a simple and inexpensive method for supplying such needs. As pre viously stated, the same dies may be employed to produce yoke members having any length whatever of lips, corresponding to the illustrated members 3 and 4c, and such lips may then be readily machined to the exact length desired and drilled at the proper points to receive the rivets or equivalent connecting members 15.

Thus, in the case illustrated by Fig. 1, the gear-center-distance, corresponding to the axle-bracket seat 5 and the lips 3 and 4, is 0C1 where O represents the center of the motor frame, that is, a point in the center of the armature shaft (not shown) and C1 represents a point in the center of the driven truckaxle, as Will be understood. The line 002 represents the gear-center-distance that is obtained by the use of the structure that is illustratedin dotted lines; namely, the axle bracket seat 18 and the lips 16 and 17. i i

' A further advantage of our present invention is that a single form of axle-bracket may be utilized in connection with a complete line of motors havingvarious gearcenter-distances, since the axle-bracket, in all cases, is associatedwith the. same axlebracket seat, 5 and may be secured thereto in any suitable manner, as by rivets (not shown) that extend through holes or open ings 21 in the axle-bracket seat.

The end members or end-rings 6 and 7 are complementary in nature by reason of be ing associated with the opposite ends of the motor frame and, consequently, it is deemed necessary to describe, in detail, only the endring 6, particularly, since the type of. endri'ng'that is employed is not essential to our present invention, which is applicable to a wide variety of motor frames.

The end-ring 6 is illustrated as being of a' shallowcup shape having its fiat outer face provided with a central opening 22 that is adapted to receive any suitable type of armature bearing-housing, in accordance with customary practice. The edges of the opening 22 are preferably reinforced by a plate member 23 of triangular or other shape.

The end rings '6 and 7 may be secured to the axle-bracket seat 5 in any suitable and convenientfmanner, but, inasmuch, as such,

construction is immaterial to our present invention, no further description. is deemed necessary I here, The preferred arrangement set forthand claimed in, a copending application of C. W. Starker andR. E. Hellmund, Serial No. 127,359, filed Oct. 24,

- 1916 (Case 5006).

However, in case the illustrated, cupshaped end-rings are adapted for direct riveting to the axle-bracket seats, a material saving in the number of different end-rings and manufacturing toolsnecessary for use in the production of a complete line of motors may be effected by forming depressions in opposite sides of each end-ring that respectively correspond to the positions of the axle-bracket seats 5 and 18, or to any other selected two positions. The proper depression, as determined by the axlebracket-seat position, is presented to the seat and the ring is suitably secured .thereto, as set forth in the above-identified patent.

The connecting members or tie-pieces 8 are preferably formed of pressed-steel and are provided with suitable ribs or bosses 24: for stiffening purposes. The tie-pieces are mechanically secured to the yoke member 1 and also to the end rings 6 and 7 through the agency of suitable rivets 25 or otherwise. The tie-pieces just described form no part of our present invention except in so far as 7 any suitable type'to perform the intended function of supporting the motor frame upon the truck (not shown) as is customary, and also to aid in mechanically connecting the yoke member 1 and the end-rings 6 and 7, as will be understood. I

We do not wish to be restricted to the structural details or arran'gement'of parts herein set forth, as varioushmodifications thereof may be effected without departing from the spirit and scope of our, invention. We desire, therefore, that only such limitations shall be imposed as are indicated in the appended claims.

We claim as our invention:

1. A magnetizable frame for inclosing the armature of a dynamo-electric machine comprising a yokehaving a gapin one side provided with outwardly-extending axlebracket-supporting lips of a length selected a selected length, and a seat member bridging said lips, whereby the distance of the seat member from the center of said framemember is determined by the length of said lips.

4. An inclosing frame member for dynamo-electric machines having a gap in one side provided with parallel-extending lips of a selected length, and an axle-bracket seat member secured to said lips, whereby the distance of the axle-bracket position from the center of said frame member is determined by the length of said lips.

5. An inclosing frame member for dynamo-electric machines having a gap in one side provided with parallel, outwardlyturned lips of a selected length, and a single axle-bracket seat member adapted to bridge said lips of whatever length, whereby a single form of axle-bracket may be employed to procure a distance between the center of the frame member and the axlebracket position that is determined by the selected length of said lips.

6. A frame for inclosing the armature of a dynamo-electric machine comprising a magnetizable yoke having spaced end portions provided with aXle-bracket-supporting lips of a length determined by the desired gear-center-distance dimension for said machine.

7. In the manufacture of a frame for a dynamoelectric machine, the method which comprises cutting a flat bar to a length determined by the gear-center distance of the machine, forming the bar into a yoke member having spaced end portions, and attaching an axle-bracket seat member to the end portions of the yoke.

8. In the manufacture of a frame for a dynamo-electric machine, the method which comprises cutting and forming a flat bar into a yoke having spaced end projections of a length determined by the gear-center distance of the machine, and attaching an axle-bracket seat member to the end portions of the yoke.

In testimony whereof, we have hereunto subscribed our names this 29 day of Sept,

RUDOLF E. HELLMUND. CHARLES W. STARKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

